My child is very big for his age his size 7 diapers are started to leaving bruises on him but they do not have size 8 and pull up boxes say size 5T/6T are equal to size 7 diapers I’m lost on what size to get we are working on potty training at the house and at pre school but don’t want his diapers to bother him anymore our insurance don’t cover diapers so in need of sizing help please no judgment